What does it say about Jeb! when his primary mode of fighting back is to bring out his mommy and brother to fight his battles in the Republican nomination? It says Jeb! is weak, definitely too weak to be Commander-in-Chief of the greatest military on the face of the earth.

George W. Bush will stump for his younger brother for the first time Monday night, attending a rally in North Charleston along with his wife, former first lady Laura Bush.

The rally comes after Jeb Bush’s most forceful debate performance of the campaign, when he pushed back on Donald Trump for attacking his brother’s national security record.

“I’m sick and tired of him going after my family,” Jeb Bush said Saturday night. “My dad is the greatest man alive, in my mind. While Donald Trump was building a reality TV show, my brother was building a security apparatus to keep us safe and I’m proud of what he did.”

It was clear that the audience was on Bush’s side, as it loudly booed Trump and cheered for Bush.

But Trump wasn’t letting go of his line of attack Monday morning, vowing to come after both brothers if necessary.

“Now that George Bush is campaigning for Jeb(!), is he fair game for questions about World Trade Center, Iraq War and eco collapse? Careful!” Trump tweeted.

Bush hasn’t always embraced his family legacy. Last summer, he seemed unprepared to answer the question of how he would have handled Iraq, painfully torn between needing to acknowledge the mistakes from the war and wanting to avoid criticism of his own brother.